From patchwork Mon Jun 22 20:08:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 11619019 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 61EE513B1 for ; Mon, 22 Jun 2020 20:12:24 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3513E20767 for ; Mon, 22 Jun 2020 20:12:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="px9e2yMm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3513E20767 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XwnRwZnI6AZhOrConnyThgzGSxGkD3iTnyg6lClXAZc=; b=px9e2yMmycwpvXStXgu5u5A67 355DGzobPFqZiagVvfPScHBoJrSDhlzBa1sJVbIXcseyomQWqxTbAvXEAqaURqIUgVvDAa0EA7io8 Ncu0Ni6f2b7dH05LIw+L2MsyC6cNH2F9nKjtiXKXIYZyHAqI9QDFHkAio8TZATSR+dPtuDauDik9T qBQp7y/OrJT2L5L1OaKqLO+uh3dQud6H7CLWQOEZgZMhPRbuGOhIwzgfsWjpqYqUFs53JfOIeZjm5 dnYasredOMyN6drTl2HkKcJyZ07Flt6FuWgNLMth3U1jnpne6KbyZpPrXeoVeJme2HSmgt8MTQeGX aQ7/RX67A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jnSlm-0006J6-3Q; Mon, 22 Jun 2020 20:10:18 +0000 Received: from mga12.intel.com ([192.55.52.136]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jnSlf-0006Gp-9x for linux-arm-kernel@lists.infradead.org; Mon, 22 Jun 2020 20:10:12 +0000 IronPort-SDR: RsITnyjKUyUQwr7ul06p5XluEuouTLC8UlAekyRQYDbghqRscAEk72au07odCccqoW/6SBqaYe 3bKAHnSZEIOw== X-IronPort-AV: E=McAfee;i="6000,8403,9660"; a="123527704" X-IronPort-AV: E=Sophos;i="5.75,268,1589266800"; d="scan'208";a="123527704" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2020 13:09:08 -0700 IronPort-SDR: 4vP0a9q4nxZFk3rk42UsXufD0AczURJ+JRz1vqb7fFaJalN7ANpprmJLw0sGyZ0iHy1s5bBTV0 F9hQHC595V1A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,268,1589266800"; d="scan'208";a="318877047" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.152]) by FMSMGA003.fm.intel.com with ESMTP; 22 Jun 2020 13:09:07 -0700 From: Sean Christopherson To: Marc Zyngier , Paolo Bonzini , Arnd Bergmann Subject: [PATCH v2 02/21] KVM: x86/mmu: Consolidate "page" variant of memory cache helpers Date: Mon, 22 Jun 2020 13:08:03 -0700 Message-Id: <20200622200822.4426-3-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200622200822.4426-1-sean.j.christopherson@intel.com> References: <20200622200822.4426-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [192.55.52.136 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Junaid Shahid , Christoffer Dall , Wanpeng Li , kvm@vger.kernel.org, Suzuki K Poulose , Joerg Roedel , Peter Shier , linux-mips@vger.kernel.org, Sean Christopherson , linux-kernel@vger.kernel.org, James Morse , linux-arm-kernel@lists.infradead.org, Ben Gardon , Vitaly Kuznetsov , Peter Feiner , kvmarm@lists.cs.columbia.edu, Julien Thierry , Jim Mattson Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Drop the "page" variants of the topup/free memory cache helpers, using the existence of an associated kmem_cache to select the correct alloc or free routine. No functional change intended. Reviewed-by: Ben Gardon Signed-off-by: Sean Christopherson --- arch/x86/kvm/mmu/mmu.c | 37 +++++++++++-------------------------- 1 file changed, 11 insertions(+), 26 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 0830c195c9ed..cbc101663a89 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -1067,7 +1067,10 @@ static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, int min) if (cache->nobjs >= min) return 0; while (cache->nobjs < ARRAY_SIZE(cache->objects)) { - obj = kmem_cache_zalloc(cache->kmem_cache, GFP_KERNEL_ACCOUNT); + if (cache->kmem_cache) + obj = kmem_cache_zalloc(cache->kmem_cache, GFP_KERNEL_ACCOUNT); + else + obj = (void *)__get_free_page(GFP_KERNEL_ACCOUNT); if (!obj) return cache->nobjs >= min ? 0 : -ENOMEM; cache->objects[cache->nobjs++] = obj; @@ -1082,30 +1085,12 @@ static int mmu_memory_cache_free_objects(struct kvm_mmu_memory_cache *cache) static void mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc) { - while (mc->nobjs) - kmem_cache_free(mc->kmem_cache, mc->objects[--mc->nobjs]); -} - -static int mmu_topup_memory_cache_page(struct kvm_mmu_memory_cache *cache, - int min) -{ - void *page; - - if (cache->nobjs >= min) - return 0; - while (cache->nobjs < ARRAY_SIZE(cache->objects)) { - page = (void *)__get_free_page(GFP_KERNEL_ACCOUNT); - if (!page) - return cache->nobjs >= min ? 0 : -ENOMEM; - cache->objects[cache->nobjs++] = page; + while (mc->nobjs) { + if (mc->kmem_cache) + kmem_cache_free(mc->kmem_cache, mc->objects[--mc->nobjs]); + else + free_page((unsigned long)mc->objects[--mc->nobjs]); } - return 0; -} - -static void mmu_free_memory_cache_page(struct kvm_mmu_memory_cache *mc) -{ - while (mc->nobjs) - free_page((unsigned long)mc->objects[--mc->nobjs]); } static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu) @@ -1116,7 +1101,7 @@ static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu) 8 + PTE_PREFETCH_NUM); if (r) goto out; - r = mmu_topup_memory_cache_page(&vcpu->arch.mmu_page_cache, 8); + r = mmu_topup_memory_cache(&vcpu->arch.mmu_page_cache, 8); if (r) goto out; r = mmu_topup_memory_cache(&vcpu->arch.mmu_page_header_cache, 4); @@ -1127,7 +1112,7 @@ static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu) static void mmu_free_memory_caches(struct kvm_vcpu *vcpu) { mmu_free_memory_cache(&vcpu->arch.mmu_pte_list_desc_cache); - mmu_free_memory_cache_page(&vcpu->arch.mmu_page_cache); + mmu_free_memory_cache(&vcpu->arch.mmu_page_cache); mmu_free_memory_cache(&vcpu->arch.mmu_page_header_cache); }